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• Burn small quantity of asafoetida in a stainless steel spoon. Pure asafoetida will burn like camphor. Adulterated asafoetida will not produce bright flame like camphor.
• There are two main varieties of asafoetida ie. Hing Kabuli Sufaid (Milky white asafoetida) and Hing Lal (Red asafoetida).
• Hing comes from the resin of giant fennel plants that grow wild in Afghanistan and Iran. The resin can be kept pure, but in the States, you mostly find it ground to a powder and mixed with wheat.